At my company's training school we had a former W/cmdr who taught various management techniques. One session involved 'cause and effect' and as an example, how a building could catch fire. He went round the classroom asking for examples of how this could happen and wrote them up on the flip chart. One chap said ''spontaneous combustion'', the next one said 'arson' and so on. He totally ignored the guy who said 'spontaneous combustion'. Spelling was not his best subject but he was a bloody good teacher!